bodge



(No Mode1.)-

J. G..BODGE.

MACHINE lFOR PORMING HOLLOW WARE FROM WOOD'PULIE. No. 287.61m Patentedoct. so, 1883K JOsEPH e. Bonenor WATERVILLE, finiture.

MACl-HNE FOR FORMING HOLLOW WARE FROM woon PULP.'`

SPEGFIATION formnervartuof .Letteralatent .No.,;28?;614,. datedlOctober. 30,1883. y Application inea Aprilalsea; No man.)

Be it known that I,y .Iosnrrr G. Bones, a citizen of the United States,residing at Vaterville, in the county of Kennebee and State of Maine,have invented certainmew and useful Improvements in Machines for Forming4 Hollow Ware from Wood Pulp, of which' the following is aspecification, reference being had therein to the accompanying drawings.

My invention relates to machines for formi ing pails yand other` hollowware from wood f pulp-or other paper-stock.

Heretofore devices and processes have been `employed in making paperpails, buckets,and

the like articles, wherein the means or parts have been so arranged thatthe pressure could be applied on the articles from. the insideoutwardly; but the result has not proved a suceess lhis .hasl arisenchie-ilyY from, the Afact that thelpeculiar manner of applying the pressure served to separate the ber or material f .f which the articles weremade, and. thus seriously damaged their unity, and they were oftencracked. There has alsobeen used for this general" purpose a niold intwo parts working toward each other and thus pressing the materialbetween them; but such a device is somewhat complex in structure, andnot well adapted tothe uses had in View in the present invention.

The object 'of my invention is to form apail` or similar article ofpaper-pulp, so that the fiber shall be laid in a strong and uniformmanner, and a heavy pressure may at once be applied in a direction atright angles to all parts of the surface without disturbing thearrangement of the fiber or the form of the pail.

I accomplish this result by means of mechanism shown in the accompanyingdrawings, of

and a, opens` into the cylinder A. Within.

the ring Il, and extending entirelyaround it, is the circular chamber b,i'iom,`which lead small holes or perforati-Ons, b', (see Fig. 2,)

which open within the cylinder A. The pipe B', with its valve B2,connects with the chamber b.

C, which I iind to work, but when molded in the exact formof the Outsideof the pail after the latter has been compressed.

D shows a pail after being formed.

F is a perforated forni covered with a felt or other porous drainer, E,the outside of which will be the exact shape and size of the insideofthe pail to be formed. The bag C,

before lthe pail is formed, fits more or less closely over the ldrainerE, The lower edge of the former F contains a iiange, on which confinesthe drainer E to the' former F. This packingring G` also forms a tightjoint between. the ,former F and. the ring. .Bl The former F is bolted,by means of the ring H, to

in the frame J, by* means o f the sweep K or other devices. A

Having described the construction yof my machine,`I now proceed to showits manner of operation. i

The valves a and a3 being closed,the pulp is admitted under considerablepressure, through the pipe B, the chamber b, and the perforations b',tothe space between the bag C and gins at once to pass through thedrainer E and the perforated former F on all sides., leaving the pulpdeposited on the ysurface of the felt. The pulp,`being forced in' muchfaster E, fills they space between the bag C and the drainer, andexpandsthe bagC until itlls 4the insidey of the cylinder A, as shown bydotted lines. A When enough pulp has been passed into the' cylinder to'form the pail of sufficient thickness, the valve b2 isclosed, shuttingoif the supply.` llhe'tensio'n of the rubber bag C, which has beendistended until now, causes it to contract toits molded form, whichshould always be somewhat smaller than the outside of the formedarticle. As thebag C contracts it forces the water of the pulp which itincloses through the drainer and closes Vitself tightly around theoutside of the formed l Clamped between the ring B andthe cy1in Jder Ais the flexible rubber bag or diaphragm`A 'rests the rubber packing-ringG,fand which the' frame I, which is rmovable vup and down ,y

the drainer E. The water of the pulpv bethan it is able to escapethrough the-drainer IOOl ail as shown in Fi 1. The valve a is now P 7 popened and water is admitted through the. pipe a, and the space betweenthe rubber bag C and the inside of the cylinder being lled, a heavypressure is applied. This hydraulic pressure', .acting at right anglesto the surface of the bag C at all points, compresses and consolidatesthe pulp, ,andjdoes not impair its strength by changing its iib'rousstructure. The pail being formed, the frame I,bearing the former and theformed pail, islowered, as shown by dotted lines', Fig. 1, and the pailremoved. The pail, having received a pressure of one hundred pounds tothe inch, for instance, which I have found suii'cient, has nearly allthe water extracted, and may be caleudered or-oth erwise nished withIease.

The water used for pressure is drawn off by as; or a special waste-pipemeans of the valve may be used. v

lIt will be observed that by my process the pail is formed andcompressed to any desired f extent automatically and without, handlingthe y ware or taking the machine apart.

I amaware that hollow ware has been formed inside of Va mold andhydrauli c` pressure applied by means'of a removable rubberl bag; butwhen a heavy pressure is thus applied it. has' been found .that thesides tend to break away' from the bottom, and thus materially weakenthe corners. By my process the corners. are' strongas any porsharp andcompact and as tion-,0f the pail.

Thexact size and shape of the bag C is a v matter-t0 b'e determined byexperiment in each case.,` y u v l y v l I donot'wish to coniine myselfto the de,-l vvicehere .shown for. raising and lowering former F, forthis ,may be done in" variety of v ways and is no part'. of myinvention.

. The pulp maybe admitted between the' bag C and the felt E by 4othermeans than here shown; but-I consider this the preferable way.' Theformer F, with its felt jacket E, may be replaced by a ,strongwoven-wire former covcombined with the removable former F, with itsdraincr E, substantially pose set forth.

2; In a machine for forming articles of paper-pulp, the cylindercontaining rubber diaphragm C, combined with the porous former F, thepipe B,for admitting the stock between the diaphragm and the former, andpipe a, for applying hydraulic pressure, all substantially as describedand shown. p

3. A machine for forming hollow ware. of

as and for the purpulp, consistingof a porous former, thel outside ofwhich is covered with a closely-fitting rubber bag, between which andthe former the pulp is admitted, combined with a pump or other means ofapplying hydraulic pressure,

substantiallyas shown and described.

4. The' process of forming vhollowware of pulp on the outside of aporous former by forcing the pulp between said former and a rubber baglitting over it, and afterward applying hydraulic pressure on therubbelgall in one operation'and without removing the formed article fromthe machine, substantially as shown and described.

5.'y The process of forming hollow articles of pulp', consisting offorming the articles on the Aoutside of a porousformen'and thenapply-ing hydraulic pressure by means of a rubber'bag fitting over `thearticle, substantially v,as described and set forth. f .l

In testimony whereof I aiix'my signature in presence of two witnesses.

JOSEPH G. BODGE. Witnesses:

S. W. BATES, L. L. MORRILL.

